Improved artificial fuel



' UNITED STATES PATENT OFFICE- GILBERT GLADDING, or PROVIDENCE, RHODE ISLAND.

IMPROVED ARTIFICIAL FUEL.

Specification forming part of Letters Patent No. 47,996, dated April I8, 1865. I

To all whom it may concern:

. State of Rhode Island, have invented a new Artificial or Composition Fuel; andIdo hereby declare that the following specification is a full, clear, and exact description thereof, and of the process by which the same ismade.

I am aware that numerous attempts have been made to render useful as an article of fuel the coal-dust which accumulates in great quantities in all city coal-yards, and which has heretofore been allowed to be wasted asrefuse material. None of these attempts, to my knowledge, have been practically successful, for the reason, as I suppose, that no element has been introduced in such compositions of a more combustible character than the dust of anthracite coal, of which the principal part of the mass is composed, to compensate for the addition of non-combustible adhesive materials necessary to be used tocause the particles I of coal-dust to be cemented together to forma mass.

I have succeeded in producing an artificial fuel which can be made with great economy, and which will burn with'entire freedom without the lumps losing their form until all combustible elements are consumed, by the use of the dust of coke, in combination with the dust of anthracite coal, in sufficient quantity to compensate for the quantity of non-combustible adhesive material necessary to be used. V

the dust of coke. I then mix with this quan pered to reduce it to a uniform consistency; I then mold it into cakes underpressure by any of the modes in usefor working clay or peat, for the purpose of solidifying themass and expressing the water. a a

a The proportions above given I have found to be the best; but the success of the process does not depend uponythe 1560f 6 Precise I1 proportions, but upon having the I coke-dust equal to or in excess of theinec amount of adhesive material. I The resultis an article of fuel which burns freely, and in the. course of combustion develops a largeamount 1 I of heat, and preserves its integrity until it is p I entirely. consumed. i

What I claim as my invention, and desi e to secure by Letters Patent, is-

tible materials above mentioned, in combina- Itake seventy-five pounds of anthraciteooal I dust and mix with it twentyfive pou ds of p A composition fuel composed of the 

